Unusual, WWI Military Wedding Photo

Early and what I thought to be a somewhat unusual photo of a Military wedding photo. I believe it to be WWI era. Bride and Groom are front row center and I'm assuming parents of Bride & Groom are front row on the ends and directly behind them in the back row. I'm also assuming the other Service Men were part of his Company in the service. Nice mustache on the father in the back row, the goatee of the Service Man back row to the far right and eye loop glass on the father front row. The photo is on heavy cardboard stock measuring 10 3/4" x 8 1/4". The photo itself is roughly 9 1/2 x 7 1/2". Back of the photo gives no identity but I was told photo came from the Pittsburgh, Pa area. Would make a nice addition to one's Military or unusual photo collection. Buyer to pay shipping & insurance.